Disposable wearable insulin dispensing device, a combination of such a device and a programming controller and a method of controlling the operation of such a device

ABSTRACT

A disposable, wearable, self-contained insulin dispensing device includes a housing and an insulin source in the housing that is connected to a catheter for injecting insulin into a user. The catheter projects generally perpendicularly to a generally planar surface of the housing configured for abutting a skin surface of the user; which planar surface includes an adhesive layer for adhering the housing surface to the skin surface. A removable release sheet covers the adhesive layer for protecting the adhesive layer prior to use of the device. The release sheet is provided with a catheter protection element to enclose and protect an end portion of the catheter, such that removal of the release sheet for exposing the adhesive layer also exposes the end portion. A pump in the housing includes an actuator employing a shape memory alloy wire.

CROSS-REFERENCE TO RELATED APPLICATION

This application is a Continuation of co-pending International Application No. PCT/DK2003/000753, filed Nov. 4, 2003, the disclosure of which is incorporated herein by reference.

BACKGROUND OF THE INVENTION

The present invention relates generally to wearable insulin dispensing devices.

In connection with injection of insulin for combatting Type I and Type II Diabetes extremely important features are simplicity of operation, reliability, cost and flexibility, which all are related to the issue of compliance which particularly in the cases of relatively mild Type II diabetes is a problem with important consequences regarding the success rate in treating the patients.

SUMMARY OF THE INVENTION

The main object of the invention is to provide a wearable insulin dispensing device having features and operation characteristics supporting and easing compliance by the users of the device.

The present invention provides a disposable, wearable, self-contained insulin dispensing device comprising

-   a housing, -   an insulin source in said housing, -   a pump means in said housing and adapted for pumping insulin from     said insulin source to a catheter for injection of said insulin in a     user of the device and, said catheter being associated with said     housing and projecting generally perpendicularly to a generally     planar surface of said housing intended for abutting a skin surface     of a user of the device, -   an adhesive layer provided on said planar surface for adhering said     planar surface to said skin surface, and -   a removable release sheet covering said adhesive layer for     protecting said adhesive layer prior to use of said dispensing     device, said release sheet being provided with catheter protection     means to enclose and protect an end portion of said catheter such     that removal of said release sheet for exposing said adhesive layer     exposes said end portion.

Hereby, in a simple, reliable and cost-effective manner a device is provided which is easy to apply and still in an effective manner protects the catheter against damage and contamination until use of the device is initiated.

In another aspect, the invention provides a disposable, wearable, self-contained insulin dispensing device comprising

-   a housing, -   an insulin source in said housing, -   a pump means in said housing and adapted for pumping insulin from     said insulin source to a catheter for injection of said insulin in a     user of the device and, said catheter being associated with said     housing and projecting generally perpendicularly to a generally     planar surface of said housing intended for abutting a skin surface     of a user of the device, -   an adhesive layer provided on said planar surface for adhering said     planar surface to said skin surface, -   a combined microphone and loudspeaker associated with said housing,     preferably arranged inside said housing, and -   recording and play back means connected to said combined microphone     and loudspeaker and associated with said housing, preferably     arranged inside said housing, such that verbal messages may be     recorded and played back by said dispensing device.

Hereby a device promoting simple communication between a health care provider and the user is provided with readily understandable operation and with good effect on the compliance rate.

In yet another aspect, the invention provides a disposable, wearable, self-contained insulin dispensing device comprising

-   a housing, -   an insulin source in said housing, -   a pump means in said housing and adapted for pumping insulin from     said insulin source to a catheter for injection of said insulin in a     user of the device, and -   an actuator for said pump means, said actuator comprising a shape     memory alloy wire, said actuator preferably further comprising a     ratchet gear or pawl wheel, a pawl adapted for cooperating with said     pawl wheel and connected to one end of said shape memory alloy wire     and a spring means connected to said pawl, the connections between     said pawl and said wire and said pawl and said spring means being     such that contraction of said wire rotates said pawl wheel against     the spring force of said spring means.

Hereby a pump means requiring very low energy and with a high degree of reliability is provided at a relatively low cost.

In a yet further aspect, the invention relates to a disposable, wearable, self-contained insulin dispensing device comprising

-   a housing, -   an insulin source in said housing, -   a pump means in said housing and adapted for pumping insulin from     said insulin source to a catheter for injection of said insulin in a     user of the device, -   an actuator for said pump means, preferably an actuator comprising a     shape memory alloy wire, and -   controlling means for controlling the operation of said actuator     according to a program, said program consisting in a sequence of a     certain amount of actuations of said actuator per 24 hour time     periods, or, in connection with provision of a timing means     connected to said controlling means said program consisting in a     sequence of actuations of said actuator that varies according to the     time of day or, in connection with provision of a timing means     connected to said controlling means and an input device for     inputting data to said controlling means, adapting said controlling     means so as to be programmable by means of said data, or adapting     said program of said controlling means to comprises algorithms for     automatically altering the sequence of actuations of said actuator     according to input of data relative to actual glucose level in the     blood of the use of the device and/or intake of nutrients by said     user.

Hereby, compliance is enhanced by providing a device with capabilities of rendering a very specific and well-tuned dosage which may be altered according to the specific development of the individual user.

In a yet further aspect, the invention relates provides a combination of a dispensing device as specified above and a programming controller, said dispensing device and said programming controller comprising cooperating transmission and/or receiving means for mutual communication of data, said programming controller preferably being a cellular telephone or a personal computer or a laptop computer or a hand held computer.

Moreover, the invention provides a method of controlling the operation of a disposable, wearable, self-contained insulin dispensing device comprising

-   a housing, -   an insulin source in said housing, -   a pump means in said housing and adapted for pumping insulin from     said insulin source to a catheter for injection of said insulin in a     user of the device, -   an actuator for said pump means, preferably an actuator comprising a     shape memory alloy wire, and -   controlling means for controlling the operation of said actuator     according to a program,     said method comprising the steps of: -   providing said controlling means with data for generating and/or     amending said program prior to and/or after initiation of use of     said dispensing device.

Furthermore, in a yet other aspect, the invention also related to a method of controlling the operation of a disposable, wearable, self-contained insulin dispensing device comprising

-   a housing, -   an insulin source in said housing, -   a pump means in said housing and adapted for pumping insulin from     said insulin source to a catheter for injection of said insulin in a     user of the device and, said catheter being associated with said     housing and projecting generally perpendicularly to a generally     planar surface of said housing intended for abutting a skin surface     of a user of the device, -   an adhesive layer provided on said planar surface for adhering said     planar surface to said skin surface, -   a combined microphone and loudspeaker associated with said housing,     preferably arranged inside said housing, -   recording and play back means connected to said combined microphone     and loudspeaker and associated with said housing, preferably     arranged inside said housing, such that verbal messages may be     recorded and played back by said dispensing device, an -   manual operating means for manually controlling the operation of     said dispensing device     said method comprising the steps of: -   recording verbal instructions in said recording means for     instructing the user of the device in the operation of said     dispensing device, and -   playing back said verbal instructions.

Finally, the invention relates to a method of controlling the operation of a disposable, wearable, self-contained insulin dispensing device comprising

-   a housing, -   an insulin source in said housing, -   a pump means in said housing and adapted for pumping insulin from     said insulin source to a catheter for injection of said insulin in a     user of the device and, said catheter being associated with said     housing and projecting generally perpendicularly to a generally     planar surface of said housing intended for abutting a skin surface     of a user of the device, -   an adhesive layer provided on said planar surface for adhering said     planar surface to said skin surface, -   a combined microphone and loudspeaker associated with said housing,     preferably arranged inside said housing, -   a programmable computing means associated with said housing,     preferably arranged inside said housing, and -   signal conversion means connected to said combined microphone and     loudspeaker and associated with said housing, preferably arranged     inside said housing, and adapted for converting received audio     signals into input signals for said computing means and for     converting output signals from said computing means to audio     signals,     said method comprising the steps of: -   transmitting audio signals to said microphone for controlling the     operation of said dispensing device, -   receiving audio signals from said loudspeaker for evaluating the     operation of said dispensing device.

BRIEF DESCRIPTION OF THE DRAWINGS

In the following, the invention will be described and explained more in detail in connection with a currently preferred insulin dispensing device according to the invention shown, solely by way of example, in the accompanying drawings where:

FIG. 1 is a schematic isometric view of a disposable insulin dispensing device according to the invention before the adhesive pad for adhering the device to a user has been mounted on the device,

FIG. 2 is a schematic isometric view of the device of FIG. 1 seen from another angle and with the adhesive pad mounted thereon,

FIG. 3 is a schematic isometric partly exploded view of the device of FIG. 2,

FIG. 4 is a schematic entirely exploded view of the device of FIG. 2,

FIG. 5 is a schematic isometric view of the device of FIG. 2 together with a programming device according to the invention,

FIG. 6 is a schematic enlarged scale exploded view of a shape memory alloy actuator mechanism according to the invention of the device of FIG. 2, and

FIG. 7 is a schematic view corresponding to FIG. 6 with the elements of the shape memory actuator shown in interconnected operative relative positions.

DETAILED DESCRIPTION OF THE INVENTION

Referring now to FIG. 1, a disposable insulin dispensing device according to the invention, generally referenced by the numeral 1, comprises a water-tight generally cylindrical housing 2 provided with a push button 3 for activating and deactivating the device as well as for activating a so-called bolus operation as explained in the following.

The housing further comprises a transparent window 4 for inspecting the operation of the device and apertures 5 for transmission of sound waves as explained in the following.

At one end of the housing 2 there is provided a stiletto 6 having a sharp needle 7 extending through a catheter 8 connected to a not shown insulin container or capsule inside the housing 2 as explained in the following.

Referring now to FIGS. 2-3, the housing 2 is fixedly received in a trough 9 of an adhesive pad 10 made of a combination of a plate 11 of skin-friendly adhesive material, for instance as well known in the field of ostomy pouches, see for instance European patent application no. 0413250 and European patent application no. 0092999, and a relatively compressible portion 10 a made of foam material attached to the plate 11. The catheter 8 extends through the planar portion 11 of the pad 10. The push button 3 is protected by the foam material 10 a so as to avoid inadvertent operation of the button for instance when the user is asleep.

A slip release film 12 is adhered to the bottom surface of the adhesive plate 11 for protecting the adhesive surface of the plate 11 such that the adhesive properties are intact when the pad is to be adhered to the skin of a user of the dispensing device. The release film 12 is provided with a protective hollow projection 13 for receiving the catheter 8 and the needle 7 of the stiletto 6 so that the needle 7 and the catheter 8 are protected by the projection 13 before use of the dispensing device 1. The housing 2 is provided with and end cover 14 on which the catheter 8 is mounted by means of a communication bushing 15 provided with an internal not shown elastomer mass and a communication passage for communicating the catheter 8 with the interior of the housing 2 as explained in the following in connection with FIG. 4.

In use, the user removes the protective release sheet 12 thereby exposing the tip of the needle 7 such that the needle may be inserted subcutaneously at the same time that the adhesive pad 10 a, 11 is adhered to the abdominal skin of the user. When the needle 7 and the catheter 8 have been inserted subcutaneously and the device has been adhered to the skin of the user, the stiletto 6 is removed whereby communication is established between the catheter 8 and the interior of the housing 2 for supplying insulin subcutaneously to the user of the device.

The elastomer mass in the bushing 15 seals the exit opening of the needle 7 when it is removed such that no insulin may leak through said exit opening but is constrained to flow solely from the capsule to the catheter 8.

Referring now to FIG. 4 showing an exploded view of the components of the insulin dispensing device according to the invention, the housing 2 contains a container or a capsule 16 for storing and dispensing insulin. The container or capsule 16 is of a well-known type having a perforatable dispensing projection 17 for receiving a catheter 18 for communicating the interior of the container 16 with the catheter 8 through the communication bushing 15 when the needle 7 has been retracted from said elastomer mass inside the bushing 15 as explained above.

A spindle 19 provided with a piston 20 is received in the container 16 such that axial displacement of the spindle towards the dispensing projection 17 will press insulin through the catheter 18 to the catheter 8. The spindle 19 is rotated and displaced by means of a shape memory alloy actuator described more in detail in the following with reference to FIG. 6.

A battery 21 for supplying power to the shape memory actuator is provided adjacent an end cover 22 of the housing 2.

The shape memory actuator comprises a pawl or ratchet wheel 23, a guide bushing 24, a spring wheel 25 and a shape memory wire 26. The operation of the shape memory actuator will be described more in detail in the following with reference to FIGS. 6 and 7.

A printed circuit board 27 is provided for controlling the function of the dispensing device and the various operational steps thereof as described in the following.

Finally a combined microphone/loudspeaker 28 is arranged inside the housing 2 adjacent the apertures 5 for receiving and emitting sound waves for the purposes described below.

Referring now to FIG. 5, a programming device or controller 29 having programming keys 30 and a display 31 is shown proximate the dispensing device for communicating with a not shown receiver/transmitter arranged inside the housing 2. The communication may take place by infra red signals or other suitable signals transmitted from and to an opening 32 leading to a transmitter/receiver inside the controller 29 to and from, respectively an opening 33 (see FIG. 2) in the end cover 22 of the housing 2 leading to said not shown transmitter/receiver inside the housing 2.

Referring now to FIGS. 6 and 7, the spindle 19 is displaced axially in the direction of the arrow R1 by counter-clockwise rotation of the pawl wheel 23 in the direction of the R2 whereby the thread 36 meshing with the internal thread 37 results in said axial displacement whereby the piston 20 is displaced further into the carpule 16 to dispense insulin through the catheter 18 to the catheter 8 (FIG. 4).

Rotation of the pawl wheel 23 is accomplished by means of the shape memory alloy (for instance Nitinol) wire 26 attached to electrically conductive rods 38 and 39 that are fixed in recesses 40 and 41, respectively, in the electrically non-conductive guide bushing 24 and the electrically conductive spring wheel 25, respectively.

The recess 40 is provided with not shown electrical contacts for electrically connecting the rod 39 to the battery 21 for supplying electrical current to the shape memory alloy (SMA) wire 26 to heat it in a manner and sequence controlled by the program elements in the printed circuit board 27.

The spring wheel 25 has U-shaped spring arms 44 and 45 for exerting a spring force on the ends 46 and 47 thereof, respectively, in a direction towards the center of the pawl wheel 23 such that the ends 46 and 47 are constantly biased to enter into engagement with the teeth of the pawl wheel 23.

The stop pins 42 and 43 are electrically connected to the printed circuit board 27 for emitting an electrical signal thereto when the spring wheel arm 48 contacts said stop pins.

The rod 38 is as mentioned above electrically connected to the power source such that an electrical current may be passed through the rod 38, the wire 26, the rod 39, the loop recess 41 and the spring wheel 25 to heat the wire 26 to cause the wire to contract and rotate the pawl wheel the distance of one tooth in the direction of arrow R2 by means of the arm end 46 engaging a tooth of the wheel until the arm 48 contacts the stop pin 42 that emits a signal to the control printed circuit board 27 whereby the current through the wire 26 is interrupted and the SMA wire 26 cools off and expands.

The other arm end 47 engages a tooth of the wheel 23 as a pawl and prevents the wheel 23 from rotating clock-wise. The spring effect of the spring wheel 25 in the tangential direction causes the arm 42 to move back into contact with the stop pin 43 thereby tightening the expanded SMA wire 26.

The signals from the stop pins 42 and 43 are also utilized to indicate correct functioning of the pump and as an indication of the number of doses administered through the catheter 8.

A dispensing device or insulin pump according to the invention may function in several different manners depending on the design and programming of the various control elements of the circuit board 27:

1. Stand Alone Pump with Constant Flow:

The pump functions as a constant flow pump and may be designed for different flow rates, for instance 20 units/24 hours, 30 units/24 hours, etc. By depressing the bolus button 3 and holding it down, the pumping program is initiated and by again pressing the button 3 down and holding it, the pumping program is terminated while a short duration pressure on the bolus button 3 activates a bolus additional dosage of insulin of a certain magnitude.

2. Stand Alone Pump with Varying Flow:

A timing device is incorporated in the printed circuit board 27 so that a standard program controls the flow dispensed by the pump during recurring 24 hour periods. The pre-programmed operating instructions may for example result in a lower dosage at night than during the day and an extra dosage at mealtimes.

3. Programmable Pump Type 1:

The pump is not provided with a predetermined program, but is provided with a programmable unit in the printed circuit board 27 and can be programmed by the user or a doctor by means of a controller 29. The programming must be able to take place through the packing material in which the dispensing device is supplied so that the user can transport the device in a sterilized out packaging on vacations or the like without having to carry the controller along. The controller is a dedicated unit that for instance via a USB plug can be connected to a PC or it can be provided with cellular telephone capability for transmission of data. The controller can thus be programmed by a doctor or a user and be used for programming of the functioning of all subsequently used disposable dispensing devices.

4. Programmable Pump Type 2:

This pump functions in the same manner as programmable pump type 1, but the controller is a personal data device such as the type marketed under the trademark PALM PILOT®, or a laptop PC. This gives the additional advantage that the user may input health information and glucose level measurement results directly into the controller or programming unit and thus communicate such information to the doctor who may use this information when deciding whether the programming function of the controller or the programming unit is to be altered for subsequently used disposable dispensing devices.

5. Programmable Pump with Audio Input and Output:

By providing the dispensing device with the microphone/loudspeaker 28 and a suitable recording/play-back chip in the printed circuit 27, short messages may be recorded by the dispensing device, and the short messages may be emitted by the device upon suitable manipulation of the bolus push button 3 or a separate recording button (not shown) mounted on the housing 2.

By means of this audio capability the user may record verbally formulated information regarding glucose levels, meal composition, exercise, etc. A timer may record the timing of each recorded message. A doctor may then use these recorded messages together with information about number and timing of bolus dosages, pumping stops and the program utilized for the dispensing of the insulin so as to evaluate the treatment and decide upon any changes in the programming and instructions to the patient which may be recorded by the doctor via a mobile telephone or the like such that messages are automatically delivered to the user at predetermined times. Such a message could for example be ‘remember to measure your glucose level’ (message program to be delivered by the dispensing device to the user each morning at 8 o'clock) and so on.

Furthermore, standard instructions can be included in the programming circuit so that the pump may deliver verbal messages to the user instead of audio signals such as beep sounds. The message could for instance be: ‘Pump is stopped’ or ‘This is your third bolus in a row and you have taken a total of eight bolus dosages today’ or ‘The pump will be empty in two hours’ and so on. Generally speaking, the audio capability described above will render the dispensing device provided with such capability much more user-friendly, especially for users initiating a treatment or not very disciplined as regards compliance.

6. Closed Loop Re-Programmable Pump:

Either the controller or the computing unit mounted in the printed circuit 27 may be programmed to react to information regarding actual glucose blood level inputted by the user perhaps together with other information, such as data regarding the timing and constitution of the last meal, to alter the programme program of the dispensing flow or dosage to take into consideration this information such that the dispensing device to a certain extent constitutes a closed loop, fuzzy logic, semi-automatic self re-programming insulin dispensing device.

The programming controller 29 may be a mobile wire-less communication device such as a cellular telephone communicating with the dispensing device by audio signals transmitted to and received from the transmitter/receiver 28. The transmissions should be preceded and terminated by an identification code to avoid disruption of the programming of the device by extraneous audio signals. Other signal identification or protection procedures such as encryption may be utilized. The audio signals may be converted to controlling signals for altering the programming of the re-programmable computing unit mounted in the circuit board 27.

Signal conversion means may be provided for converting the audio signals received by the receiver into input signals for the computing means and for converting output signals from the computing means into audio signal for being transmitted by the loudspeaker.

So-called SMS signals may also be utilized for transferring information between a wire-less mobile communications unit and the dispensing device, for instance by means of IR signals or so-called Bluetooth communication technology.

Although the basic concept of the invention is that the entire device is disposable, a variation may be that the receiver/transmitter unit 28 with recording and play back components and corresponding battery and perhaps circuit board with computing means is reusable and may be releasably received in a holder provided on the disposable portion of the device. 

1. A disposable pump device for dispensing insulin, comprising: a wearable pump housing that defines a space to receive a separate container; an insulin container that is insertable into the space defined by the wearable pump housing, the insulin container having a perforatable dispensing end through which insulin is to be dispensed; a piston rod comprising screw threads on an outer surface portion, the piston rod being movably arranged in the wearable pump housing to dispense the insulin from the insulin container when the insulin container is inserted in the wearable pump housing; a drive system to advance the piston rod toward the insulin container and thereby dispense the insulin when the insulin container is inserted in the wearable pump housing; and a battery to supply electrical power for operation of the disposable pump device, the battery being positioned inside the wearable pump housing, wherein the entire pump device is disposable and non-reusable.
 2. The device of claim 1, wherein the disposable pump device communicates with a controller device having buttons and a display.
 3. The device of claim 2, wherein the disposable pump device communicates with a controller device via wireless communication signals.
 4. The device of claim 2, wherein the controller device comprises at least one of a cellular phone device, a personal computer device, a laptop computer device, or a handheld computer device.
 5. The device of claim 1, further comprising a button interface associated with the wearable pump housing that is configured to activate a bolus operation for dispensing the insulin from the insulin container.
 6. The device of claim 1, wherein the wearable pump housing is water-tight when the insulin container is inserted in the is received in the wearable pump housing.
 7. The device of claim 1, further comprising a catheter to communicate the insulin dispensed from the insulin container into a user.
 8. The device of claim 7, wherein the catheter projects generally perpendicular to a generally planar surface of the pump housing, further comprising an adhesive layer coupled to the generally planar surface of the pump housing to adhere the pump housing to skin of the user.
 9. The device of claim 8, further comprising a removable release sheet to cover the adhesive layer, the release sheet including a catheter protection structure that at least partially encloses an end portion of the catheter when the release sheet covers the adhesive layer.
 10. The device of claim 1, wherein the drive system comprises a gear wheel, a pawl arranged to engage at least one tooth of the gear wheel, and a spring device coupled to the pawl so as to urge the pawl to rotate the gear wheel.
 11. The device of claim 1, wherein the drive system includes a shape memory alloy actuator.
 12. The device of claim 1, wherein the wearable pump housing is wearable on the skin of a user.
 13. The device of claim 1, further comprising a transparent window portion arranged on the wearable pump housing to view the insulin container when the insulin container is inserted in the wearable pump housing.
 14. The device of claim 1, wherein the wearable pump housing of the disposable pump device is wearable on a user's body and dispenses insulin to the user via a catheter tube while a handheld controller device having a user-interface buttons and a display communicates with the disposable pump device.
 15. The device of claim 14, wherein the wearable pump housing is water-tight when the insulin container received the wearable pump housing outputs insulin through the catheter tube to the user.
 16. The device of claim 15, wherein the insulin container is viewable through a generally transparent window portion disposed on the wearable pump housing when the disposable pump device dispenses insulin to the user via the catheter tube.
 17. The device of claim 16, wherein the handheld controller device receives user input indicative of glucose level measurement results.
 18. The device of claim 1, wherein the wearable pump housing defines the space to slidably receive a generally cylindrical container through an opening in the wearable pump housing, wherein the piston rod comprises a generally cylindrical body portion having the screw threads on the outer surface portion of the generally cylindrical body portion, wherein the drive system is positioned inside the wearable pump housing, and wherein the wearable pump housing includes one or more structures that hinder removal of the insulin container and connection with a subsequent insulin container.
 19. The device of claim 18, wherein the disposable pump device communicates with a controller device having buttons and a display.
 20. The device of claim 18, wherein the disposable pump device dispenses insulin to the user at a new dosage rate in response to user input indicative of glucose level measurement results.
 21. The device of claim 18, further comprising a button interface associated with the wearable pump housing that is configured to activate a bolus operation for dispensing the insulin from the insulin container.
 22. The device of claim 18, wherein the drive system comprises a gear wheel, a pawl arranged to engage at least one tooth of the gear wheel, and a spring device coupled to the pawl so as to urge the pawl to rotate the gear wheel.
 23. The device of claim 18, wherein the wearable pump housing of the disposable pump device is wearable on a user's body and dispenses insulin to the user via a catheter tube while a handheld controller device having a user-interface buttons and a display communicates with the disposable pump device, wherein the insulin container is viewable through a generally transparent window portion disposed on the wearable pump housing when the disposable pump device dispenses insulin to the user via the catheter tube.
 24. A disposable pump device for dispensing insulin, comprising: a wearable pump housing that defines a space to receive a separate container; an insulin container that is insertable into the space defined by the wearable pump housing, the insulin container having a perforatable dispensing end through which insulin is to be dispensed; a piston rod comprising screw threads on an outer surface portion, the piston rod being movably arranged in the wearable pump housing to dispense the insulin from the insulin container when the insulin container is inserted in the wearable pump housing; a drive system to advance the piston rod toward the insulin container and thereby dispense the insulin when the insulin container is inserted in the wearable pump housing; and a battery to supply electrical power for operation of the disposable pump device, the battery being positioned inside the wearable pump housing, wherein the entire pump device is disposable and non-reusable, wherein the wearable pump housing of the disposable pump device is wearable on a user's body and dispenses insulin to the user via a catheter tube while a handheld controller device having a user-interface buttons and a display communicates with the disposable pump device, wherein the wearable pump housing is water-tight when the insulin container received the wearable pump housing outputs insulin through the catheter tube to the user, wherein the insulin container is viewable through a generally transparent window portion disposed on the wearable pump housing when the disposable pump device dispenses insulin to the user via the catheter tube, and wherein the handheld controller device that is connectable to a computer for transmission of data.
 25. The device of claim 24, further comprising a button interface associated with the wearable pump housing that is configured to activate a bolus operation for dispensing the insulin from the insulin container.
 26. The device of claim 24, wherein the drive system comprises a gear wheel, a pawl arranged to engage at least one tooth of the gear wheel, and a spring device coupled to the pawl so as to urge the pawl to rotate the gear wheel.
 27. A disposable pump device for dispensing insulin, comprising: a wearable pump housing that defines a space to receive a separate container; an insulin container that is insertable into the space defined by the wearable pump housing, the insulin container having a perforatable dispensing end through which insulin is to be dispensed; a piston rod comprising screw threads on an outer surface portion, the piston rod being movably arranged in the wearable pump housing to dispense the insulin from the insulin container when the insulin container is inserted in the wearable pump housing; a drive system to advance the piston rod toward the insulin container and thereby dispense the insulin when the insulin container is inserted in the wearable pump housing; and a battery to supply electrical power for operation of the disposable pump device, the battery being positioned inside the wearable pump housing, wherein the entire pump device is disposable and non-reusable, wherein the wearable pump housing of the disposable pump device is wearable on a user's body and dispenses insulin to the user via a catheter tube while a handheld controller device having a user-interface buttons and a display communicates with the disposable pump device, wherein the wearable pump housing is water-tight when the insulin container received the wearable pump housing outputs insulin through the catheter tube to the user, wherein the insulin container is viewable through a generally transparent window portion disposed on the wearable pump housing when the disposable pump device dispenses insulin to the user via the catheter tube, wherein the handheld controller device receives user input indicative of glucose level measurement results, and wherein the disposable pump device dispenses insulin to the user at a new dosage rate in response to the user input indicative of glucose level measurement results.
 28. The device of claim 27, further comprising a button interface associated with the wearable pump housing that is configured to activate a bolus operation for dispensing the insulin from the insulin container.
 29. The device of claim 27, wherein the drive system comprises a gear wheel, a pawl arranged to engage at least one tooth of the gear wheel, and a spring device coupled to the pawl so as to urge the pawl to rotate the gear wheel. 